Difference between revisions of "Thelia"
in A. Gray, Manual ed. 2, 660. 1856.
FNA>Volume Importer |
imported>Volume Importer |
||
| (6 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
{{Treatment/ID | {{Treatment/ID | ||
|accepted_name=Thelia | |accepted_name=Thelia | ||
| − | |accepted_authority=Sullivant | + | |accepted_authority=Sullivant |
|publications={{Treatment/Publication | |publications={{Treatment/Publication | ||
|title=in A. Gray, Manual ed. | |title=in A. Gray, Manual ed. | ||
| Line 22: | Line 22: | ||
|distribution=North America;ne Mexico;West Indies (Dominican Republic). | |distribution=North America;ne Mexico;West Indies (Dominican Republic). | ||
|discussion=<p>Species 3 (3 in the flora).</p><!-- | |discussion=<p>Species 3 (3 in the flora).</p><!-- | ||
| − | --><p>Thelia is remarkable in its glaucous, bluish green color, thick, densely tomentose mats, and tumid to julaceous stems and branches. The stem leaves are distinctively deltoid-ovate with rhombic cells, simple or 3–6-branched columnar papillae, and frequently long-ciliate margins. The sporophyte has a long seta and typically erect, symmetric, cylindric to ovoid-cylindric capsules. The diplolepidous peristome is yellowish white. The endostome segments and cilia are often reduced to nublike projections on a low or high basal membrane.</p><!-- | + | --><p><i>Thelia</i> is remarkable in its glaucous, bluish green color, thick, densely tomentose mats, and tumid to julaceous stems and branches. The stem leaves are distinctively deltoid-ovate with rhombic cells, simple or 3–6-branched columnar papillae, and frequently long-ciliate margins. The sporophyte has a long seta and typically erect, symmetric, cylindric to ovoid-cylindric capsules. The diplolepidous peristome is yellowish white. The endostome segments and cilia are often reduced to nublike projections on a low or high basal membrane.</p><!-- |
| − | --><p>In the field, Thelia could be confused with Myurella (Pterigynandraceae) because both genera have terete-foliate stems and branches that occur in mats or cushions, radiculose stems, and a similar color. Myurella rarely occurs in dense mats, and its leaves have short, double costae, serrate or sinuate-dentate margins, and lower, unbranched papillae.</p> | + | --><p>In the field, <i>Thelia</i> could be confused with <i>Myurella</i> (Pterigynandraceae) because both genera have terete-foliate stems and branches that occur in mats or cushions, radiculose stems, and a similar color. <i>Myurella</i> rarely occurs in dense mats, and its leaves have short, double costae, serrate or sinuate-dentate margins, and lower, unbranched papillae.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
| Line 54: | Line 54: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Thelia | name=Thelia | ||
| − | + | |authority=Sullivant | |
| − | |authority=Sullivant | ||
|rank=genus | |rank=genus | ||
|parent rank=family | |parent rank=family | ||
| Line 66: | Line 65: | ||
|publication year=1856 | |publication year=1856 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V28/V28_1000.xml |
|genus=Thelia | |genus=Thelia | ||
}}<!-- | }}<!-- | ||
-->[[Category:Treatment]][[Category:Theliaceae]] | -->[[Category:Treatment]][[Category:Theliaceae]] | ||
Latest revision as of 21:33, 5 November 2020
Plants small to medium-sized. Stems 1-pinnate or irregularly branched, branches erect-ascending, simple or irregularly branched; epidermal cells elongate; rhizoids reddish brown, densely branched, smooth. Leaves deltoid-ovate; base decurrent; apex broadly acute to obtuse, abruptly contracted, acumen long, apiculate or piliferous; costa single or sometimes double, 1/2–3/4 leaf length, sometimes spurred or 2-fid; alar cells quadrate or subrectangular; laminal cells rhombic to fusiform, stoutly 1-papillose abaxially, papillae columnar, simple or 3–6-branched. Seta yellowish when young, red when mature, flexuose when dry, smooth. Capsule cylindric to ovoid-cylindric, symmetric to somewhat curved, smooth to weakly wrinkled when dry; exothecial cells at mouth oblate to quadrate, proximal cells quadrate to short-rectangular, enlarged, red, walls thin to thick; stomata on neck; annulus rudimentary, persistent, 2- or 3-seriate, cell walls thin; operculum conic-subulate; exostome teeth united at base on short, smooth membrane, white, linear, external surface smooth basally, finely papillose distally, trabeculae and median line thickened, internal surface lightly papillose, trabeculae weak; endostome rudimentary, white, lightly papillose, basal membrane low or high, segments reduced to stubs or to 1/2 exostome length, cilia 1 or 2, nublike or absent. Spores smooth to lightly papillose.
Distribution
North America, ne Mexico, West Indies (Dominican Republic).
Discussion
Species 3 (3 in the flora).
Thelia is remarkable in its glaucous, bluish green color, thick, densely tomentose mats, and tumid to julaceous stems and branches. The stem leaves are distinctively deltoid-ovate with rhombic cells, simple or 3–6-branched columnar papillae, and frequently long-ciliate margins. The sporophyte has a long seta and typically erect, symmetric, cylindric to ovoid-cylindric capsules. The diplolepidous peristome is yellowish white. The endostome segments and cilia are often reduced to nublike projections on a low or high basal membrane.
In the field, Thelia could be confused with Myurella (Pterigynandraceae) because both genera have terete-foliate stems and branches that occur in mats or cushions, radiculose stems, and a similar color. Myurella rarely occurs in dense mats, and its leaves have short, double costae, serrate or sinuate-dentate margins, and lower, unbranched papillae.
Selected References
None.
Lower Taxa
Key
| 1 | Stem leaf laminal cell papillae simple. | Thelia hirtella |
| 1 | Stem leaf laminal cell papillae usually 3-6-branched | > 2 |
| 2 | Stems creeping, densely and regularly 1-pinnate, often densely tomentose, branches simple; leaf acumina usually spreading-piliferous. | Thelia asprella |
| 2 | Stems often ascending, sparsely and irregularly branched, lightly tomentose, branches irregularly branched; leaf acumina erect, apiculate. | Thelia lescurii |